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Leafnode denials of service

2005-11-03T00:00:00
ID OPENVAS:136141256231011517
Type openvas
Reporter Copyright (C) 2003 Michel Arboi
Modified 2020-03-20T00:00:00

Description

According to its version number in the banner the Leafnode NNTP server is vulnerable to a denial of service.

                                        
                                            # OpenVAS Vulnerability Test
# Description: Leafnode denials of service
#
# Authors:
# Michel Arboi <arboi@alussinan.org>
#
# Copyright:
# Copyright (C) 2003 Michel Arboi
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2,
# as published by the Free Software Foundation
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.11517");
  script_version("2020-03-20T07:32:27+0000");
  script_tag(name:"last_modification", value:"2020-03-20 07:32:27 +0000 (Fri, 20 Mar 2020)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_cve_id("CVE-2002-1661");
  script_bugtraq_id(6490);
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_name("Leafnode denials of service");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2003 Michel Arboi");
  script_family("General");
  script_dependencies("nntpserver_detect.nasl");
  script_require_ports("Services/nntp", 119);
  script_mandatory_keys("nntp/detected");

  script_tag(name:"solution", value:"Update to version 1.9.48 or later.");

  script_tag(name:"summary", value:"According to its version number in the banner
  the Leafnode NNTP server is vulnerable to a denial of service.");

  script_tag(name:"impact", value:"The service may:

  - go into an infinite loop with 100% CPU use when an article that has been crossposted to
  several groups, one of which is the prefix of another, and when this article is then requested
  by its Message-ID.

  - hang without consuming CPU while waiting for data that never come.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_banner");

  exit(0);
}

include("nntp_func.inc");
include("misc_func.inc");

port = nntp_get_port(default:119);

banner = get_kb_item("nntp/banner/" + port);
if(!banner || "Leafnode" >!< banner)
  exit(0);

# Example of banner:
# 200 Leafnode NNTP Daemon, version 1.9.32.rel running at localhost (my fqdn: www.example.com)

if(ereg(string:banner, pattern:"version +1\.9\.2[0-9]") ||
   ereg(string:banner, pattern:"version +1\.9\.([3-9]|[1-3][0-9]|4[0-7])[^0-9]") ||
   ereg(string:banner, pattern:"version +1\.9\.19")) {
  security_message(port:port);
  exit(0);
}

exit(99);
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